Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load
Joint Authors
Ma, Jianjun
Yang, Weichao
Shi, Chenghua
Lin, Yuexiang
Lei, Mingfeng
Liu, Linghui
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-09-02
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Impact loads widely exist in practical engineering and often cause cumulative damage and cracks or even fracture failure of concrete structures with their repeated long-term action.
This experimental research is conducted on the damage evolution characteristics of concrete under impact loads by regarding C50 nonreinforced concrete as the research object and using a self-developed drop-weight device with electromechanical impedance measurement technology.
Results show the following.
(1) Under low-energy impact, concrete damage has long continuous development process and remarkable cumulative effects.
An apparently sudden break characteristic appears before failure.
Under high-energy impact, concrete damage accumulates rapidly, and piezoceramic patch signals grow linearly.
(2) The root mean square deviation (RMSD) of the concrete increases exponentially with impact times.
Particularly, when the RMSD exceeds 0.075, the concrete damage process enters the rapid development stage and approaches the critical failure state.
(3) Under the experimental conditions in this study, the relationship between the ultimate impact times (damage life) and impact heights of the concrete samples shows the development trend of the power function.
The above results can provide reference for the research on service life prediction methods of concrete structures under impact loads.
American Psychological Association (APA)
Lei, Mingfeng& Liu, Linghui& Lin, Yuexiang& Ma, Jianjun& Shi, Chenghua& Yang, Weichao. 2020. Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load. Shock and Vibration،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1209749
Modern Language Association (MLA)
Lei, Mingfeng…[et al.]. Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load. Shock and Vibration No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1209749
American Medical Association (AMA)
Lei, Mingfeng& Liu, Linghui& Lin, Yuexiang& Ma, Jianjun& Shi, Chenghua& Yang, Weichao. Experimental Investigation of Damage Evolution Characteristics of C50 Concrete under Impact Load. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1209749
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1209749